Mill.



No. 800,073. PATENTED SEPT. 19, 1905.

' J. OIHALEWSKI.

MILL.

APPLICATION FILED JAN. 19, 1905.

' a SHEETS-SHEET '1.

Ma mfi m w No.800.073. PATENTED SEPT. 19, 1905.

' J. CIHALEWSKI.

MILL.

APILIGATION FILED JAN.19, 1905.

3 SHEETS-SREET 2;

UNIT-ED STATES J ULIJ AN CIHALEWSKI, OF

PATENT orrroni CHICAGO, ILLINOIS, ASSIGNOR TO J. CIHA- LEWSKI FARM MILLMANUFACTURING COMPANY, OF CHICAGO, I ILLINOIS, A CORPORATION OFILLINOIS. I

Specification of Letters Patent.

Patented Sept. 19, 1905.

Application filed Tanuary 19,1905. Seria1No.24.1, 753.

To all whom it may concern: I

Be it known that .I, J U'LIJAN CIHAL WsKI, a subject of the Emperor ofAustria-Hungary, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and novel features, which are shownin the accompanying drawings as embodied in my pre- .ferred form ofconstruction.

In the aforesaid drawings, Figure 1 is an elevation of my improveddevice. Fig. 2 is a'view partly in elevation and partly in centralVertical section; Fig. 3 is a view partly in plan and partly inhorizontal section, the

line being indicated at 3 3 in'Fig. 2; and Fig.

4 is a detail central vertical section in the line.

4 4 of Fig. 3, a portion of the device being shown inelevation.

Referring to the drawings, A is a suitable base having anupwardly-projecting arm A, which carries two vertical journals (0 a. The

journal a is provided atits lower end with an adjusting-screw a conicalat its upper end to furnish a bearing for a shaft B, which extendsthrough the journals a a and'bears two pulleys I) b, one loose and theother fast on the shaft. On the upper end of the shaft B-is a plate C,preferably of hard steel, the same being frusto-conical in form, asillustrated.

The plate rests upon a flange b on the shaft B. Above this plate issecured a grindingcone D, the general form of which is clearly indicatedin the drawings. This cone is provided with a plurality ofsteeply-spiral grooves 0?, each of said. grooves having a plurality ofpits d along'its center line. The plate and cone are clamped on theshaft B by nuts I), threaded upon the upper end of the shaft.Surrounding the grinding-cone D is a box IE, arranged to receive thegrinding-cone D, the space surrounding said cone tapering off toward thebottom thereof. The hollow of the box E has a plurality of steeplyconical grooves 6, similar to the grooves on the grinding-cone and likethem provided with pits e".

' than the other parts.

A grinding-ring Fissupported in the lower end of the box E and fits thefrusto-conical surface of the plate C.

- A hopper Gr is supported by the frame of the machine, the same openinginto a tube g,

the lowerend of which is perforated at g to open into a-flaring chamberG, communicating with the box E. A thimble H is provided within the tube9, the same having perforations fi, which can be brought intoregistration with the perforations g. A handle it is provided by whichthe thimble can be rotated and the amount of material to be fed to themill regulated. A second hopper I collects the material which passesthrough the mill and discharges it through a spout z'.

The operation of my improved device will" be readily apparent. The grainto be ground is placed in the hopper and passes down into the box E,where itis caught between the conical grooves of the box andgrinding-cone and broken up. This crushing is assisted by the pits inthe grooves, which greatly roughen the surfaces and also by the factthat the grooves being spirally displaced forces the material'downwardwith a screw action into the most constricted portion of the spacebetween the box and grinding-cone. After the grain is roughly broken upin this way it passes into the, very narrow space between thegrinding-ring F and plate C and is very finely pulverized, eventuallypassing out into the second hopper. The fineness of the meal can beregulated by the screw of, by which the space between the grinding-ringF and plate D can be varied as desired.

My improved device is particularly advantageous in'that thegrinding-surfacesof thebox and grinding-cone are provided with pits inthe spiral grooves by which an additional roughness is given to thesurface which appears after a long period of'wear, even after thegrooves are very much worn down. These pits assist very greatly in thebreaking up of izhe grain and make the devicemuch more effective. Thedevice is also advantageous able that they be formed so as to be readilycapable of replacement and so that they can be formed of harder materialthan is necessary for the other parts of the device.

I realize that considerable variation is possible in the details of thisconstruction without departing from the spirit of the invention, and Itherefore do not intend to limit myself to the specific form hereinshown and described.

I claim as new and desire to secure by Letters Patent 1. In a device ofthe class described, the combination With a box having a roughly-conicalchamber and means forfeeding grain thereto, of a conical grinding-coneWithin said box,

, spiral grooves on the opposing faces of said box and cone, and pits insaid grooves.

2. In a device of the class described, the combination With a boxhavingaroughly-conical chamber and means for feeding grain thereto, of aconical grinding-cone Within said box, spiral grooves on the opposingfaces of said box and cone, and pits in said grooves, a frusto-conicalplate of hard material below said grinding-cone and removable therefromand a removable grinding-ring supported by the box and opposed to theHaste-conical surface of said plate.

3. In a device of the class described, the combination with a boxhavinga roughly-conical chamber and ad justable means for leedi n ggrain thereto, of aconical grimling-cone within said box, spiral grooveson the opposing faces of said box and cone, and pits in said grooves.

in Witness whereof I have signed the above application for LettersPatent, at Chicago, in the county of Cool; and State of Illinois, this17th day of January, A. D. 1905.

JULIJAN GIHALE\VSKI.

Witnesses:

Geo. M. MAYER, CHAS. O. SnnRvnY.

